linux-kernel - Re: [PATCH 2/2] drm: drop drm

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Date:   Wed, 17 May 2017 19:13:47 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     kbuild-all@...org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Daniel Vetter <daniel.vetter@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Sean Paul <seanpaul@...omium.org>,
        David Airlie <airlied@...ux.ie>, Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH 2/2] drm: drop drm_[cm]alloc* helpers

Hi Michal,

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v4.12-rc1 next-20170517]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Michal-Hocko/drm-replace-drm_-cm-alloc-by-kvmalloc-alternatives/20170517-150333
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: arm-allmodconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All error/warnings (new ones prefixed by >>):

   drivers/gpu//drm/etnaviv/etnaviv_gem.c: In function 'etnaviv_gem_userptr_do_get_pages':
>> drivers/gpu//drm/etnaviv/etnaviv_gem.c:751:9: error: implicit declaration of function 'kvmallo_array' [-Werror=implicit-function-declaration]
     pvec = kvmallo_array(npages, sizeof(struct page *), GFP_KERNEL);
            ^~~~~~~~~~~~~
>> drivers/gpu//drm/etnaviv/etnaviv_gem.c:751:7: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
     pvec = kvmallo_array(npages, sizeof(struct page *), GFP_KERNEL);
          ^
   cc1: some warnings being treated as errors

vim +/kvmallo_array +751 drivers/gpu//drm/etnaviv/etnaviv_gem.c

   745	{
   746		int ret = 0, pinned, npages = etnaviv_obj->base.size >> PAGE_SHIFT;
   747		struct page **pvec;
   748		uintptr_t ptr;
   749		unsigned int flags = 0;
   750	
 > 751		pvec = kvmallo_array(npages, sizeof(struct page *), GFP_KERNEL);
   752		if (!pvec)
   753			return ERR_PTR(-ENOMEM);
   754	

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